How do I measure my own Segment Height?

If you would like to measure your own segment height then you will need to have the frame in hand, because you can only measure it while the glasses are on your head. You can either purchase the frame without lenses first and then send them back to have lenses put in after the segment height has been measured. Or if you have already received your glasses and feel the segment height is not correct, you can use the frames you already have.

No Line Progressive

1. Take an mm ruler or download and print one.

2. Put the glasses on your face and adjust them so that they sit comfortably.

3. Stand about 8 inches (20 cm) away from a well-lit mirror with your face parallel and square to the mirror.

4. Align the ruler's zero (0) measurement to the lowest point at the bottom of your lens, keeping it exactly vertical. Make sure you are measuring from the bottom of the clear lens, not the bottom of the frame (see graphic below).

5. Stare straight ahead and read the millimeter line that lines with the center of your pupil. This is your segment height measurement for these frames.

6. Repeat these steps at least 3 to 5 times to get an accurate and consistent measurement. Make sure your head and the ruler do not move after lining up the zero (0) measurement with the bottom of your lens until you note your measurement. Ask a friend to help if you are having trouble.

 

Lined Bifocal

1. Take an mm ruler or download and print one.

2. Put the glasses on your face and adjust them so that they sit comfortably.

3. Stand about 8 inches (20 cm) away from a well-lit mirror with your face parallel and square to the mirror.

4. Align the ruler's zero (0) measurement to the lowest point at the bottom of your lens, keeping it exactly vertical. Make sure you are measuring from the bottom of the clear lens, not the bottom of the frame (see graphic below).

5. Stare straight ahead and read the millimeter line that lines about 1mm below the bottom eyelid. This is your segment height measurement for these frames.

6. Repeat these steps at least 3 to 5 times to get an accurate and consistent measurement. Make sure your head and the ruler do not move after lining up the zero (0) measurement with the bottom of your lens until you note your measurement. Ask a friend to help if you are having trouble.